#include "iso14443crc.h"
#include "parity.h"
#include "protocols.h"
+#include "crapto1/crapto1.h"
+#include "mifarehost.h"
enum MifareAuthSeq {
masNt,
masNrAr,
masAt,
+ masFirstData,
masData,
masDataNested,
masError,
};
static enum MifareAuthSeq MifareAuthState;
+static TAuthData AuthData;
+
+void ClearAuthData() {
+ AuthData.uid = 0;
+ AuthData.nt = 0;
+ AuthData.first_auth = true;
+}
/**
* @brief iso14443A_CRC_check Checks CRC in command or response
{
switch(MifareAuthState) {
case masNone:
+ case masFirstData:
case masData:
case masDataNested:
case masError:
default:
return 2;
}
-
}
void annotateIso14443a(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize)
{
switch(cmd[0])
{
- case ISO14443A_CMD_WUPA: snprintf(exp,size,"WUPA"); break;
+ case ISO14443A_CMD_WUPA:
+ snprintf(exp,size,"WUPA");
+ MifareAuthState = masNone;
+ break;
case ISO14443A_CMD_ANTICOLL_OR_SELECT:{
// 93 20 = Anticollision (usage: 9320 - answer: 4bytes UID+1byte UID-bytes-xor)
// 93 70 = Select (usage: 9370+5bytes 9320 answer - answer: 1byte SAK)
snprintf(exp,size,"ANTICOLL-2"); break;
}
}
- case ISO14443A_CMD_REQA: snprintf(exp,size,"REQA"); break;
+ case ISO14443A_CMD_REQA:
+ snprintf(exp,size,"REQA");
+ MifareAuthState = masNone;
+ break;
case ISO14443A_CMD_READBLOCK: snprintf(exp,size,"READBLOCK(%d)",cmd[1]); break;
case ISO14443A_CMD_WRITEBLOCK: snprintf(exp,size,"WRITEBLOCK(%d)",cmd[1]); break;
case ISO14443A_CMD_HALT:
return;
}
-void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, bool isResponse) {
+void annotateMifare(char *exp, size_t size, uint8_t* cmd, uint8_t cmdsize, uint8_t* parity, uint8_t paritysize, bool isResponse) {
+ // get UID
+ if (MifareAuthState == masNone) {
+ if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && cmd[1] == 0x70) {
+ ClearAuthData();
+ AuthData.uid = bytes_to_num(&cmd[2], 4);
+ }
+ if (cmdsize == 9 && cmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && cmd[1] == 0x70) {
+ ClearAuthData();
+ AuthData.uid = bytes_to_num(&cmd[2], 4);
+ }
+ }
+
switch(MifareAuthState) {
case masNt:
- if (cmdsize == 4) {
- snprintf(exp,size,"AUTH: nt");
+ if (cmdsize == 4 && isResponse) {
+ snprintf(exp,size,"AUTH: nt %s", (AuthData.first_auth) ? "" : "(enc)");
MifareAuthState = masNrAr;
- printf("--ntok\n");
+ if (AuthData.first_auth)
+ AuthData.nt = bytes_to_num(cmd, 4);
+ else
+ AuthData.nt_enc = bytes_to_num(cmd, 4);
+ AuthData.nt_enc_par = parity[0];
return;
} else {
MifareAuthState = masError;
- printf("--err %d\n", cmdsize);
}
break;
case masNrAr:
- if (cmdsize == 8) {
- snprintf(exp,size,"AUTH: nr ar");
+ if (cmdsize == 8 && !isResponse) {
+ snprintf(exp,size,"AUTH: nr ar (enc)");
MifareAuthState = masAt;
+ AuthData.nr_enc = bytes_to_num(cmd, 4);
+ AuthData.ar_enc = bytes_to_num(&cmd[4], 4);
+ AuthData.ar_enc_par = parity[0] << 4;
return;
} else {
MifareAuthState = masError;
}
break;
case masAt:
- if (cmdsize == 4) {
- snprintf(exp,size,"AUTH: at");
- MifareAuthState = masData;
+ if (cmdsize == 4 && isResponse) {
+ snprintf(exp,size,"AUTH: at (enc)");
+ MifareAuthState = masFirstData;
+ AuthData.at_enc = bytes_to_num(cmd, 4);
+ AuthData.at_enc_par = parity[0];
return;
} else {
MifareAuthState = masError;
annotateIso14443a(exp, size, cmd, cmdsize);
}
+
+bool DecodeMifareData(uint8_t *cmd, uint8_t cmdsize, bool isResponse, uint8_t *mfData, size_t *mfDataLen) {
+ *mfDataLen = 0;
+
+ if (cmdsize > 32)
+ return false;
+
+ if (MifareAuthState == masFirstData) {
+ if (AuthData.first_auth) {
+ uint32_t ks2 = AuthData.ar_enc ^ prng_successor(AuthData.nt, 64);
+ uint32_t ks3 = AuthData.at_enc ^ prng_successor(AuthData.nt, 96);
+ struct Crypto1State *revstate = lfsr_recovery64(ks2, ks3);
+ lfsr_rollback_word(revstate, 0, 0);
+ lfsr_rollback_word(revstate, 0, 0);
+ lfsr_rollback_word(revstate, AuthData.nr_enc, 1);
+ lfsr_rollback_word(revstate, AuthData.uid ^ AuthData.nt, 0);
+
+ uint64_t lfsr = 0;
+ crypto1_get_lfsr(revstate, &lfsr);
+ crypto1_destroy(revstate);
+// LastKey = lfsr;
+ PrintAndLog(" | * | key | probable key:%x%x Prng:%s ks2:%08x ks3:%08x | |",
+ (unsigned int)((lfsr & 0xFFFFFFFF00000000) >> 32), (unsigned int)(lfsr & 0xFFFFFFFF),
+ validate_prng_nonce(AuthData.nt) ? "WEAK": "HARD",
+ ks2,
+ ks3);
+
+ AuthData.first_auth = false;
+ } else {
+ printf("uid:%x nt:%x ar_enc:%x at_enc:%x\n", AuthData.uid, AuthData.nt, AuthData.ar_enc, AuthData.at_enc);
+ }
+
+
+
+ MifareAuthState = masData;
+ return true;
+ }
+
+ if (MifareAuthState == masData) {
+ }
+
+ return *mfDataLen > 0;
+}
+